Import patches-unapplied version 3.6.1-0ubuntu13 to ubuntu/trusty-proposed

Imported using git-ubuntu import.

Changelog parent: d0b1a7f99edeea70f117d5942fe8cc71a98405b3

New changelog entries:
* debian/patches/allow-replacement: Make the D-Bus interface able to be
replaced, so that Unity (or others in future) can take it over if they
want to provide their own screensaver implementations. No need to listen
to NameOwnerChanged, only NameLost — so we don't have to wake
gnome-screensaver up every time this signal goes across the bus.
* debian/patches/33_unity_lockscreen_on_lock.patch:
- disable this patch as unity doesn't need it anymore
* debian/patches/19_not_autostart_in_unity.patch:
- do not autostart GS in unity session

Import patches-unapplied version 3.6.1-0ubuntu11 to ubuntu/trusty-proposed

Imported using git-ubuntu import.

Changelog parent: 9a3e263e44acf7e71ffaeedc074ee4c9134cbfbd

New changelog entries:
* debian/patches/33_unity_lockscreen_on_lock.patch:
- Use the original GNOME lock screen if the screen reader is enabled and
running. The unity lock screen is not accessible to screen reader users.